The 'be in a fight or headed to the closest fight' rule is still valid. If that closest fight happens to contain the wabbit, you can then dogpile him,her, or it.
For Example and these numbers are not accurate as I'm just pulling them out of.....
thin air, if two people are heading for the wabbit who is basically north of them 20 miles away.
As they get closer to the wabbit's fight which is now 15 miles away and these two people are now 10 miles apart,
they should engage each other as they are now the closest fight.